IIAP Publications: Recent submissions

  • High resolution time profile of decimetric type-III bursts 
    Cecatto, J. R; Sawant, H. S; Fernandes, F. C. R; Krishan, V; Neri, J. A. C. F; Moraes, J. C (Elsevier B. V., 2003)
    Type-III bursts are signatures of the electron beams accelerated during the solar flares, their observation and investigation provide information of the acceleration processes, the characteristics of the exciting agent and ...
  • Holographic recording in Fe:Ce:Ti doped LiNbO3 crystal 
    Banyal, R. K; Prasad, B. R (Elsevier, 2007-06)
    High diffraction efficiency measurements in a triply doped Fe:Ce:Ti LiNbO3 crystal are reported. The crystal shows an improved recording sensitivity, weak light-induced scattering and extremely slow readout erasure which ...
  • Effect of the M 9.3 Sumatra-Andaman islands earthquake of 26 December 2004 at several permanent and campaign GPS stations in the Indian continent 
    Jade, S; Vijayan, M. S. M; Gupta, S. S; Kumar, P. D; Gaur, V. K; Arumugam, S (Taylor and Francis Ltd, 2007-07)
    The effect of the 26 December 2004 Sumatra-Andaman earthquake on the Indian continent has been estimated from the analysis of GPS data from permanent and campaign GPS sites in the Indian continent. Co-Seismic displacements ...
  • New mountings of concave reflection holographic grating 
    Singh, M; Reddy, G. P (Elsevier, 1987-06)
  • Comparison of computed fluxes for Fe X and Fe XIV lines with observed values at 1980 eclipse 
    Raju, P. K; Singh, J (Kluwer Academic Publishers, 1987-09)
    Fluxes have been computed for Fex (6374 Å) and Fe xiv (5303 Å) lines as a function of solar radii and at various coronal tempratures. The electron density derived from the white light corona during the total solar eclipse ...
  • Large dust grains in the dark cloud B5 
    Bhatt, H. C (Royal Astronomical Society, 1986-09)
    Polarization measurements of stars in the region of the dark cloud B5 indicate that the average dust grain size in the cloud is much larger than the mean interstellar grain size. Within the cloud, the average grain size ...
  • Chromospheric CA II K-line variations in the sun as a star over a solar cycle 
    Sivaraman, K. R; Singh, J; Bagare, S. P; Gupta, S. S (American Astronomical Society, 1987-02)
    The disk-averaged Ca II K profiles obtained at the Kodaikanal solar tower telescope for the period 1969-1984 are used to study the chromospheric variations in the sun as a star. The 1A index shows increases of 18 and 28 ...
  • Uncertainty principle limits on the cosmological constant 
    Sivaram, C (Springer, 1986-08)
    The identification of the cosmological constant term with the energy density of the vacuum enables lower and upper limits to be placed on its value. The upper limit arises from the constraint that the total zero-point ...
  • Effects of spacetime curvature and rotation on arrival times of pulses from fast pulsars 
    Kapoor, R. C; Datta, B (American Astronomical Society, 1986-12)
    General relativistic effects due to spacetime curvature and rotation on the arrival times of pulsar signals are investigated using a rotationally perturbed spherical metric. It is found that for the millisecond pulsar PSR ...
  • IRAS observations of R Cor Bor stars 
    Kameswara Rao, N; Nandy, K (Royal Astronomical Society, 1986-09)
    The IRAS observations of R Cr B, SU Tau and V 348 Sgr indicate the existence of a cool dust component of temperature about 30 K in R Cr B and SU Tau and less than or equal to 100 K in V 348 Sgr, in addition to the hot dust. ...
  • HF Doppler observations of small scale plasma motions in the equatorial electrojet 
    Sastri, J. H; Ramesh, K. B; Rao, J. V. S. V; Rao, D. R. K (The Royal Swedish Academy of Sciences, 1986-12)
    Recordings of the variations in phase path, P of reflections, at vertical incidence, from blanketing sporadic-E layers over Kodaikanal (dip 3.5°N) revealed small amplitude, quasi-sinusoidal oscillations of 45-180 s periods ...
  • Expanding chromospheres of late G and K supergiants 
    Mallik, S. G. V (Royal Astronomical Society, 1986-09)
    The radiative transfer problem in non-LTE moving atmospheres has been explicitly solved for Hα line profiles. These computations have been done for a schematic model of the line-forming region over a wide range of optical ...
  • The variation of the 5200 feature in HD 34452 
    Shylaja, B. S; Babu, G. S. D (Royal Astronomical Society, 1986-10)
    Spectrophotometric observations of the hot Si star HD 34452 = HR 1732 obtained over a duration of four years, from 1979 to 1983, are presented. The period of variation in the broad-band feature centred around λ5200 is found ...
  • General relativistic decollimation of a jet 
    Kapoor, R. C (Gordon and Breach Science Publishers, 1986)
    The effect of defocusing introduced by spacetime curvature in a narrow conical beam of particles emanating from the vicinity of a compact mass is considered, with application to the study of jets. The deflection in particle ...
  • Periodic modulations in the optical light curves of EX Hydrae 
    Seetha, S; Sharma, D. P; Padmini, V. N; Marar, T. M. K; Kasturirangan, K (Kluwer Academic Publishers, 1987-02)
    The authors present here new results on the periodic modulations in the optical light curves of EX Hydrae observed during 1982 - 84. The period analysis has been done using synchronous summation and discrete Fourier transform ...
  • Photometry of the Rs-Canum Binary II-PEG 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V (International Astronomical Union, 1986)
    B and V photometry of II Peg obtained at Kavalur on 39 nights during 1980 - 81, 1981 - 82 and 1984 - 85 is presented. From an analysis of the available data on this object the authors find that no two light curves agree ...
  • Occultation of SAO 185428 by 336 Lacadiera 
    Paranjpye, A; Babu, G. S. D (Indian Academy of Sciences, 1986)
  • A spectrophotometric study of the Wolf-Rayet star HD 50896 
    Shylaja, B. S (Indian Academy of Sciences, 1986-12)
    New spectrophotometric observations of the Wolf-Rayet system HD 50896 are presented and interpreted in terms of its binary nature. The lines of N V, N IV and C IV show moderate variations which can be explained using a ...
  • A New Polarimeter for Stellar Polarization Measurement 
    Saxena, A. K (International Astronomical Union, 1986)
    A polarimeter for the measurement of Stokes' parameters for stellar and quasi stellar objects in specific wavelength regions has been reported. The variable retardation and dispersive property of a small angle Babinet ...
  • Minimum Relative Entropy Method - Solution to Missing Short Baseline Problem 
    Shevgaonkar, R. K (Indian Academy of Sciences, 1986-12)
    The minimum-relative-entropy method (MREM) is proposed as a solution to the missing short-baseline problem in radio synthesis observations. It is shown that a measure of distance between the prior model and the image in ...

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